different running classes 2 2 4 6 8 Class B mi 1 Compare the shapes of the dot plots 6 Class A mi 4 2 Compare the centers of the dot plots 3 Compare the spreads of the dot plots 10 4 Calculate the medians of the dot plots 5 Calculate the ranges of the dot plots 10 12 12 run per week for two 14 14 Definitions Measures of Center Mean Used for symmetric distributions Median Used for skewed distributions Mode Used for data with multiple peak usually separated with a gap Measures of Spread Variability IQR Used for skewed distributions Range Mostly used in symmetric distributions with no outliers 6 What do the medians and ranges of two dot plots tell you about the data